public function handleDeleteUser($user_id)
{
$this->onBeforeRestrictedFunctionality($this);
try {
$this->users->delete($this->users->findOneBy(['id' => $user_id]));
$this->flashMessage('Uživatel byl úspěšně smazán.', 'success');
} catch (\Exception $exc) {
$this->flashMessage($exc->getMessage(), 'danger');
}
$this->redirect('this');
}